Federico Sansonetti defeated Gaston Arturo Grimolizzi 7-6 3-6 6-3 in the Argentina F4 round of 32 on clay. The upset overturned the form book — Gaston Arturo Grimolizzi came in leading the head-to-head 2–0. Federico Sansonetti claimed a first win over Gaston Arturo Grimolizzi in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-04-11 | Brazil F9 | R16 | clay | Gaston Arturo Grimolizzi | 6-3 6-1 |
| 2008-09-29 | Argentina F11 | QF | clay | Gaston Arturo Grimolizzi | 6-2 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.